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Reference Detail
| Reference | ||
|---|---|---|
| Author | Liu L., Xia W., Li H., Zeng H., Wei B., Han S., Yin C. | |
| Title | Salinity Inhibits Rice Seed Germination by Reducing alpha-amylase Activity via Decreased Bioactive Gibberellin Content. | |
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Abstract: Seed germination plays important roles in the establishment of seedlings and their subsequent growth; however, seed germination is inhibited by salinity, and the inhibitory mechanism remains elusive. Our results indicate that NaCl treatment inhibits rice seed germination by decreasing the contents of bioactive gibberellins (GAs), such as GA1 and GA4, and that this inhibition can be rescued by exogenous bioactive GA application. To explore the mechanism of bioactive GA deficiency, the effect of NaCl on GA metabolic gene expression was investigated, revealing that expression of both GA biosynthetic genes and GA-inactivated genes was up-regulated by NaCl treatment. These results suggest that NaCl-induced bioactive GA deficiency is caused by up-regulated expression of GA-inactivated genes, and the up-regulated expression of GA biosynthetic genes might be a consequence of negative feedback regulation of the bioactive GA deficiency. Moreover, we provide evidence that NaCl-induced bioactive GA deficiency inhibits rice seed germination by decreasing alpha-amylase activity via down-regulation of alpha-amylase gene expression. Additionally, exogenous bioactive GA rescues NaCl-inhibited seed germination by enhancing alpha-amylase activity. Thus, NaCl treatment reduces bioactive GA content through promotion of bioactive GA inactivation, which in turn inhibits rice seed germination by decreasing alpha-amylase activity via down-regulation of alpha-amylase gene expression. |
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| Journal | Front Plant Sci | |
| Country | China | |
| Volume | 9 | |
| Pages | 275 | |
| Year | 2018 | |
| PubMed ID | 29556245 | |
| PubMed Central ID | 5845124 | |
| DOI | 10.3389/fpls.2018.00275 | |
| URL | - | |
| Relation | ||
| Gene | AMY1A AMY1C AMY3B AMY3E CPS1 D18 EPE1 GA2OX1 GA2OX2 GA2OX3 GA2OX5 GA2OX6 GNP1 KAO KO1 KS1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
